On 01/08/16 21:54, OmegaPhil wrote: > I'm currently looking into the following repeatable crash when I browse > to the root of a large aufs volume with FileZilla: > > ==================================================================== > > Program received signal SIGSEGV, Segmentation fault. > 0x00007fbd72a6988e in rdu_buf_lock () from /usr/lib/libau.so > (gdb) bt > #0 0x00007fbd72a6988e in rdu_buf_lock () from /usr/lib/libau.so > #1 0x00007fbd72a69e81 in closedir () from /usr/lib/libau.so > #2 0x000055a4e2c722ff in ?? () > #3 0x000055a4e2c73952 in ?? () > #4 0x00007fbd726e0730 in __libc_start_main (main=0x55a4e2c6fbf0, > argc=1, argv=0x7fff25531358, > init=<optimized out>, fini=<optimized out>, rtld_fini=<optimized > out>, stack_end=0x7fff25531348) > at ../csu/libc-start.c:291 > #5 0x000055a4e2c6fc89 in ?? () > (gdb) info sharedlibrary > From To Syms Read Shared Object Library > 0x00007fbd72a694d0 0x00007fbd72a6a940 Yes (*) /usr/lib/libau.so > 0x00007fbd726df890 0x00007fbd7280b3b4 Yes > /lib/x86_64-linux-gnu/libc.so.6 > 0x00007fbd724b8da0 0x00007fbd724b993e Yes > /lib/x86_64-linux-gnu/libdl.so.2 > 0x00007fbd7229da80 0x00007fbd722aa591 Yes > /lib/x86_64-linux-gnu/libpthread.so.0 > 0x00007fbd72c70ac0 0x00007fbd72c8c3c0 Yes > /lib64/ld-linux-x86-64.so.2 > 0x00007fbd720912d0 0x00007fbd72095821 Yes > /lib/x86_64-linux-gnu/libnss_compat.so.2 > 0x00007fbd71e7bff0 0x00007fbd71e87451 Yes > /lib/x86_64-linux-gnu/libnsl.so.1 > 0x00007fbd71c6a0b0 0x00007fbd71c70335 Yes > /lib/x86_64-linux-gnu/libnss_nis.so.2 > 0x00007fbd71a521b0 0x00007fbd71a58031 Yes > /lib/x86_64-linux-gnu/libnss_files.so.2 > (*): Shared library is missing debugging information. > > ==================================================================== > > This is associated with /usr/lib/openssh/sftp-server. I've tried to > build the aufs-util source with debugging information by changing the > 'override CFLAGS' to: > > override CFLAGS += -Og -Wall -ggdb3 > > Make clean and then making as usual. > > However libau.so.2.7 is always built with no debugging symbols: > > ==================================================================== > > $ dwarfdump libau/libau.so.2.7 > > .debug_info > > .debug_pubnames > > .debug_str > > .debug_aranges > > .debug_frame > > .debug_static_func > > .debug_static_vars > > .debug_weaknames > > ==================================================================== > > I don't have much experience debugging libraries, but the Makefile is > pretty straightforward... doesn't look like anything is stripping it? > > For reference I can browse to the directory on the SFTP server with the > sftp binary, so it must be something to do with fzsftp (associated with > FileZilla) that is upsetting it. > > > > ------------------------------------------------------------------------------
This isn't yet ready for a bug report, but I'm running on Debian Testing with kernel 4.5.5-1, with v4.5-20160523 for the driver.
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